# OpenedDoor Seafarer vs Engine Room Simulator

The clearest difference is in-app purchases: OpenedDoor Seafarer at none against Engine Room Simulator's 2. Engine Room Simulator's advantage is rating (4.8 vs 4.5). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. Engine Room Simulator sells 2 in-app purchases, starting at $9.99 per year. OpenedDoor Seafarer asks for nothing beyond the download.

Engine Room Simulator holds the better App Store score, 4.8 against 4.5. Both are backed by a comparable volume of ratings — 4 and 4 respectively.

OpenedDoor Seafarer ships an update fortnightly, Engine Room Simulator every 3 weeks. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | OpenedDoor Seafarer | Engine Room Simulator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (4 ratings)](https://appshunter.io/ios/app/openeddoor-seafarer/id6755544892/reviews) | **[4.8 (4 ratings)](https://appshunter.io/ios/app/engine-room-simulator-ers/id6767850469/reviews)** |
| Number of ratings | 4 | 4 |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Monetization | **Free** | Free with in-app purchases |
| Size | 33 MB | 174 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [YAMMOBOTS COMPANY LIMITED](https://appshunter.io/developer/1461729686) | [Louie Juera](https://appshunter.io/developer/1638500957) |

## What reviewers say

### OpenedDoor Seafarer

[App page](https://appshunter.io/ios/app/openeddoor-seafarer/id6755544892)

This app provides Myanmar seafarers with access to online applications, educational resources, and progress tracking. Users can enroll in online classes, monitor their learning journey, and obtain downloadable certificates upon completion.

**Highlights:** Online class enrollment, Progress tracking, Assessments, Downloadable certificates, Seafarer resources

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Engine Room Simulator

[App page](https://appshunter.io/ios/app/engine-room-simulator-ers/id6767850469)

This app offers a high-fidelity simulation for marine engineering training. It allows users to practice shipboard engine-room procedures, from safety training to full voyage simulation, with clear guidance and feedback. Ideal for cadets, students, and seafarers to build practical skills anytime, anywhere.

**Highlights:** High-fidelity marine engineering simulation, PPE safety training and induction, Generator synchronization and startup, Full voyage simulation, Guided and assessment learning modes, Offline practice capability

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ERS Pro Yearly | $9.99 | per year |
| ERS Pro Lifetime | $19.99 | one-time |


## Frequently asked questions

### Is OpenedDoor Seafarer free?

OpenedDoor Seafarer is free to download, with no in-app purchases.

### Is Engine Room Simulator free?

Engine Room Simulator is free to download, with in-app purchases available.

### Which has better reviews, OpenedDoor Seafarer or Engine Room Simulator?

Engine Room Simulator is rated higher. OpenedDoor Seafarer averages 4.5 out of 5 from 4 ratings, while Engine Room Simulator averages 4.8 from 4 ratings.

### Do OpenedDoor Seafarer or Engine Room Simulator have ads?

Neither OpenedDoor Seafarer nor Engine Room Simulator shows ads.

### Which is updated more often, OpenedDoor Seafarer or Engine Room Simulator?

OpenedDoor Seafarer ships an update fortnightly, and Engine Room Simulator every 3 weeks. Most recently, OpenedDoor Seafarer was updated on November 5, 2026 and Engine Room Simulator on October 31, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*